Pressure-tap.



C. L. FERMAN.

PRESSURE TAP.

@PILIGATION FILED JAN. 13, 1909.

Patented sep1;.6,'1910.

2 SHEETS-SHEET 1.

WI TNESSES IN VEN TOR CYRAL L. FER N df yyZ///M/K ATTORNEYS C. L. FERMAN.

PRESSURE TAP.

APELIGA 1101 ULEB JAN.13,1:309.

'Jatemef Sept. 6, 1910. v

2 SHEETS-SHEET 2.

WITNESSES.' INYENTUR Y C?. 'KM//ef/z. CYHAL L', N

A TTORNE VS CYRAL L. FERMAN, OF MILAN,- MICHIGAN.

PRESSURE-TAP.

Specification of'Letters Paten-t.

Patented Sept. 6, 1910.

Application `filed January 1 3, 1909. Serial No. 472,100.

To all whom 'it may concern:

Be 1t known that I Cra-xr. lL. FERMAN, a`

' citizen of the United States of America, re-

Qsiding at Milan, in the county of ilashte-A that there is no diliiculty in preventing lealk-` age.

The invention consists in the matters hereinafter setforth, and more particularly pointed out in the appended claims.- f

Referring to the drawings, Figure 1' is a' view in longitudinal vertical section ofa machine embodying features of the inyention. Fig. 2 is a View, partially in section and partially in elevation, taken at right angles to Fig. 1. Fig. 3 is a view in section and partially broken away, of a modified form of the invention. Fig. 4f is a view at right angles to Fig. 3.

In the drawings, a casing 1 has a chambered foot 2 adapted to be stepped'in a coun;

. terbored aperture of any one, 3, of a number of interchangeable shoes, the lower face of which is curved to conform to a pipe or main of a certain diameter, each shoe beingv arranged to tit one standard size of pipe. A gasket l is interposed between the foot. and shoe, and a packing sheet. is used to form a close jointI between the shoe and any pipe, indicated at (3, to which it may loe'ap plied. To facilitate removal of the machine intact, cap screws loosely interlocking with a. groove inthe shoe, or other like means are employed to hold the easing and shoe together. A chain 7, or other flexible means, engaging a lug on one side of' the casing, and draw-n taut around the main by a bolt 9 on the other side, into which the chain is hooked, affords a convenient means of clamping the machine in place on the main which it is desired to tap.

A. circular member l() is rotatably secured in the upper end of the casing l in such i from the lsleeve.

locked with the sleeve to be forced thereby,

manner as to roek or rotate in a planetransverse to the axis of anylpipe to which the 'using may be attached. The member may be mounted on suitable journals 1l engaging bearing boxes 12, the latter being of any usual construction whereby the parts may be taken up yfor wear, and the member having a close sliding fit both with .the bottom and sides of the recess so that it is in effecta closure adapted to cut ofi' an aperture 13 connecting the recess with the chamber 11 in the foot 2. 0r, as indicated in Figs. 3 and 1, the casing may be horizontally tapervbored and the member correspondingly tapered and rotatably secured in the aperture by a washer 15 seated 1n the counterbored smaller end of the aperture and an axial .ca p screw 1G, having a squared, keyed or splined upper portionengaging a closely fitting aperture in the? washer.

A tube 17 is screw-threaded into or otherwise secured in one end of a diametrically disposed tap guide aperture 1S 'through/the axial register with the aperture 13 by ,turningI the. disk Iand locking it with a piny 1,9 or the like passing through registeringlapertures in the easing and disk. A sleeve v20' provided with a hand-wheel 21 or like means by which it ma)v be readily turned. is interiorly screw-threaded to engage the outwardly screw-threaded end of the tube 1T. spindle 22 is rotatable and reciprocable tl'n'ough an apertured eros-s wall 231m the. outer end of-the sleeve anda packing gland 24 thereon of any preferred type, and has al socket at its inner end to receive the shank ot a combination drill and tap 9.5 or other like tool whose body is preferably m'ade to' nicelyv tit the tap guide aperture 1S.

A. co'l` lar or flange 2G on the inner end of ythc spindle prevents its complete withdrawal The spindle may be int-ertoward the main by a yoke '27 rotatablyien-l gagii-ig a reduced portion 28-.near the upper end of the'spindle with depending arms 29 adapted to hook over pins or lugs 30 on the sleeve. 'lhe squared upper end iof the spindle is adapted to receive an ordinary die stock 3l or other preferred form of handle by which it. ma v bercadily turned. A `second tube. 23; is secured in one end of a dia' metrically disposed plug guide aperture oblnpie to and intersecting the aperturel 18, and a shaft 234 is rotatable and longitudimovable member which may be brought in i nally reciprocable therein through a stuiIing nox ot' any preferred type, on the outer end of the tube. The outer end of the shaft is squared or otherwise fitted for reception of a die stock or like operating handle, and its inner end, which has'a retaining flange 36 limiting its outward movement, is recessed or otherwise fitted as a cap Wrench to engage a pipe plug 37 or any other pipe fitting which may be inserted .and screwed home in the tapped hole formed by the tap when the movable member is rocked over so that the aperture 33 is alined with the tapped hole, the locking pin 19 being inserted through a corresponding aperture 38 in the said rotatable member.

' Where a tap and drill'is Ato be used of sulicient diameter to require no steadying,

the movable memberis provided with asingle large diametrical aperture 39 (Figs. 3 and yi) into one end of which a single bone net Lit) is screwed or otherwise closely fitted, with a stem 4l passing through a packing gland 4Q b v which a large globe valve or like itting #i3 may be inserted in the hole left by a tool 44 which may be forced obliquely through the aperture 39 by exterior tube, sleeve and spindle yoke secured on an oblique hollow boss 45 of the bonnet and arranged as in the first described form of device.

In operation, the casing is inserted in a shoe corresponding in curvature to the main to be tapped,"preferably with the disk in a plane parallel to the axis of curvature of the sleeve, after the proper tap drill is inserted in the top guide aperture and spindle socket, and the corresponding plug fitting or nipple is placed in the other guide aperture or in the bonnet in engagement with the nipple shaft. The machine is then clamped in place, and the tap drill worked through the wall of the main, the operator holding it to its Work by feeding it down with the outer sleeve which is placed in engagement with the spindle yoke. The chips Work out.

into the chamber of the casing. IVhen the tapping is completed, the tap drill is run back clear of the hole, and the yoke disengaged from the sleeve, allowing the tap spindle and drill to be Withdrawn past the line of travel of the plug or nipple shaft.

The locking pin is then Withdrawn, the movable member is rocked over and relockcd with the plug shaft in alinement With the tapped hole, and the plug or nippleinserted by pushing down and rotatinr the shaft.

A feature is the small surfLace displayed against pressure from the main when the latter is tap ed through, so that the joints can be rea ily made to prevent leakage. Another important result obtained is the rigidity and simplicity of the machine which is not injured readily by the rough usage to which it is necessarily subjected.

Obviously, changes in the details of construction may be made without departing from the spirit ofthe invention, and I do not care to limit myself to any particular form or arrangement of parts.

IV hat I claim as my invention iszl. A pipe tapping machine comprising a casing having an apertured foot provided with a concave surface adapted to be seated on a pipe, a member rotatable in the casing in a plane transverse to the axis of curvature of the foot, a longitudinally reciprocable and rotatable tap, operating spindle disposed in the member in a plane radial to the curved face of the foot, and a longitudinally reciprocable and rotatable shaft diametrically disposed in the member, the shaft and spindle being severally adapted to be brought into register With the foot aperture by oscillation of the member.

2. A pipe tapping machine comprising` a casing having an apert-ured foot with a concave surface adapted t0 be seated on a pipe, a member rotatable in the casing in a plane transverse to the axis of curvature of the foot face, a longitudinally reciprocable and rotatable tap operating spindle diametrically disposed in the member, a guide tube extending froni the member concentric with the spindle, a sleeve in telescopic screwthreadcd engagement with the tube, a yoke bearing inwardly against a shoulder on the outer portion of the spindle adapted to de tachably engage the sleeve, and a longitudinally reciprocable and rotatable shaft 100 diametrically disposed in the member, the shaft and spindle being severally adapted to be brought into register with the foot aperture by oscillation ot' the member.

In testimony -whereot' I aiiiX my signature in presence of two Witnesses.

CYRAL L. FERMAN. Witnesses:

' C. R. S'rIoKNnY,

T. E. BARTHEL. 

